Seo In Guk (서인국) – 행복했을까 (Were We Happy) (Feat. Goo Hye Sun 구혜선) ☆ Full Album Playlist http://www.youtube.com/playlist?list=PLh1FnrV6pZe8TlFoyIulwnjSm8J-8L…
Seo In Guk (서인국) – 행복했을까 (Were We Happy) (Feat. Goo Hye Sun 구혜선)
What Is SEO / Search Engine Optimization?
SEO stands for “search engine optimization.” It is the process of getting traffic from the “free,” “organic,” “editorial” or “natural” listings on search engines. All major search engines such as Google, Yahoo and Bing have such results, where web pages and other content such as videos or local listings are shown and ranked based on what the search engine considers most relevant to users.